Air valve



H. BROWN -ET AL AIR VALVE Filed Fb. .23, 1926` 2 Sheets-Sheet 1 Jwmw ffafzold roww www @w j W www May 17, 1927.

May 17,1927.

H. BROWN ET A1.

AIR VALVE I 2 Sheets-Shea?l 2 Filed Feb.23, 1926 A enorm@ Patented May 17, 1927.

UNITED STATES PATENT oFFl-cs.

HAROLD BROWN, F KANSAS CITY, AND GEORGE R. UHL, 0F TONGANOXIE, KANSAS.

AIB, VALVE.'

Application med February 23, 1926. serial'no. 90,181.

This invention relates to an improved air valve particularly adapted for the cylinder., of air brakes commonly used in connection with railroad cars. It is to be understood'that the air valve provided in this invention may be used on other cylinders of suitable type without departing in any degreev from the spirit of this invention. l i Various objects of this invention will appear in the following detailed description of the device and as disclosed inthe two sheets of drawings whichis herewith made a part of the application.

In the drawings, similar numerals of the different views represent the same element.

Fig. 1 illustrates a sectional side'elevational view of an air valve.

-Fig.2 represents a vertical sectional-view showing the lever armlin operative position, the view being taken along the line 2-e2 of Fig. 1.

Fig. 3 illustrates a sectional elevational view of a modified form .of air valve over that disclosed in Fig. 1 and showing the relationship of the lever arm thereto. Numeral 38 `designates a section of the exhaust port in the valve construction.

Fig. 4 represents a vplan view of. the guide and support for the splring disclosing the air passage therethroug Fig. 5 represents a plan view of a modified form of lever.

Fig. 6 illustrates a plan view of a modified form of lever over the forms disclosed in Figures 3 and 5.

Figures 7 and 8 illustrate further modified forms of air valves adapted for the cylinder of air brakes commonly used in connection with railroad cars.

Numeral 1 designates the housing of an air valve for brakes commonly `used `for instance, on railroad cars, while numeral 11 desi ates the valve stem having a valve portion 6 adapted to b e held `in tension or rn position within the cylinder by means of sprlng 5, the'spring 5 being guided and supported by the means of a plate 2 having "Suitable openings 3,0ada ted to allow the *.1 free passage of air theret irough. An operating lever arm 7 is ada ted to be positioned in interlocked relationship `with the housing 1 of the air valve andthe piston A4 by means of suitable pins 8 and 9.

Fig. 1 discloses a modified form of air valve having a housing 10, a stem 11, a valve 12 and tension spring 13, the operating lever 14 being clearly disclosed in Fig. 2 in interlocked relationship with the housing 1() by means of pins 15 and 16. The lever arm 17 disclosed in'Fig. 5 is slightly modified in construction over the levers disclosed in Figures 2 and 3,'in that, when lever 17 is operated by pulling in either direction, it rocks in slots 18 and 19, instead of notches 20, 21, 22,'and 2,3;

Fig. 6 illustrates a slightly modified form of levers 24, ,over the levers disclosed in Figures 2, 3 and 5,' in that the slots 25 and 26 are horizontal.

Fig. 7 designatesv the modified form of air valve having a housing 27, a tension spring 28, a valve portion 29, and a valve stem 3() adapted to be operated by means of operatinv lever 31 positioned in interlocked relations ip with the housing 27 by means` of pins 32 and 3B. f

Fig. 8, represents a further modilication of an air valve 34, and the operating lever arm. 35, the tension spring 36, in this case being located above the valve 37.

In operation, this invention provides a simple improved air valve for cylinders, inexpensive to manufacture, and easily operated, particularly as appliedy to the air release :for the cylinder of air brakes now commonly used on railroad cars. At the present time, in the operation of bleeding air brake c linders, it is a common practice to bleed tie cylinder or car, before cutting loose from the engine, as. for instance, in switching. To accomplish this, avmember of the train crew pulls a lever and-holds it from half aminute to Bminutes or more for each car switched. l

One of the principal objects of this invention is to provide mechanical means for releasing the air in a few seconds, thereby saving the time of the train crew and materially expediting the work of4 the train switching. The practice is, -When cutting a car loose from an engine, to Vpull a lever and hold it until the air is released,l while this In an air releasing device, a Casing, a being provided With airports, and means for valve seat portion and a stem for the seat depressing the stem, thereby releasing the portion slidably positioned Within the easvalve.

ing, a spring tension means for the seat por- In testimony whereof we ax our signation, means for guiding the stem and Suptures. porting the spring, consisting of a, plate snt- HAROLD BROWN.v

ably positioned Within the casing, the plate GEORGE R. UHL. 

